EP2789838A1 - Système d'entraînement - Google Patents

Système d'entraînement Download PDF

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Publication number
EP2789838A1
EP2789838A1 EP20140158834 EP14158834A EP2789838A1 EP 2789838 A1 EP2789838 A1 EP 2789838A1 EP 20140158834 EP20140158834 EP 20140158834 EP 14158834 A EP14158834 A EP 14158834A EP 2789838 A1 EP2789838 A1 EP 2789838A1
Authority
EP
European Patent Office
Prior art keywords
drive system
pump
hydraulic motor
internal combustion
combustion engine
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP20140158834
Other languages
German (de)
English (en)
Inventor
Bouzid Seba
Tobias Dettmann
Daniel Engeter
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Liebherr Machines Bulle SA
Original Assignee
Liebherr Machines Bulle SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Liebherr Machines Bulle SA filed Critical Liebherr Machines Bulle SA
Publication of EP2789838A1 publication Critical patent/EP2789838A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02G—HOT GAS OR COMBUSTION-PRODUCT POSITIVE-DISPLACEMENT ENGINE PLANTS; USE OF WASTE HEAT OF COMBUSTION ENGINES; NOT OTHERWISE PROVIDED FOR
    • F02G5/00—Profiting from waste heat of combustion engines, not otherwise provided for
    • F02G5/02—Profiting from waste heat of exhaust gases
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K23/00—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids
    • F01K23/02—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled
    • F01K23/06—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled combustion heat from one cycle heating the fluid in another cycle
    • F01K23/065—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled combustion heat from one cycle heating the fluid in another cycle the combustion taking place in an internal combustion piston engine, e.g. a diesel engine
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K23/00—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids
    • F01K23/02—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled
    • F01K23/06—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled combustion heat from one cycle heating the fluid in another cycle
    • F01K23/10—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled combustion heat from one cycle heating the fluid in another cycle with exhaust fluid of one cycle heating the fluid in another cycle
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

Definitions

  • the present invention relates to a drive system with an internal combustion engine and an energy recovery system for recovering energy from the waste heat of the internal combustion engine.
  • the present invention relates to a drive system in which the energy recovery system comprises a fluid circuit having a pump, a heat exchanger and an expander.
  • Such a drive system is from the EP 2 527 635 A2 known.
  • the drive of the pump of the energy recovery system via an electric motor, which is controlled by operating parameters of the internal combustion engine and / or the energy recovery system.
  • Object of the present invention is to provide a drive system with an internal combustion engine and an energy recovery system available, which requires a smaller space and is more robust.
  • the drive system comprises an internal combustion engine and an energy recovery system for recovering energy from the waste heat of the internal combustion engine, wherein the energy recovery system comprises a fluid circuit with a pump, a heat exchanger and an expander.
  • the pump of the energy recovery system is driven by a hydraulic motor.
  • Hydraulic motors have a significantly higher power density than electric motors. As a result, a considerable space advantage can be achieved. Furthermore, a hydraulic pump has a longer service life. In addition, a hydraulic motor is insensitive to EMC influences. Furthermore, the use of a hydraulic motor reduces the risk of sparking in the vicinity of the fluid circuit of the energy recovery system.
  • the hydraulic motor can have a rated power of between 0.1 kW and 10 kW, preferably between 0.5 kW and 3 kW.
  • the present invention is therefore particularly preferably used when the fluid recycling equipment of the energy recovery system is ammonia, propane, ethanol, methanol or R 245 sa. Different embodiments are conceivable for the drive of the hydraulic pump.
  • an engine oil pump of the internal combustion engine is used to drive the hydraulic motor. This requires no additional component to drive the hydraulic pump. Rather, can be used on the already existing engine oil pump. Furthermore, the hydraulic pump according to the invention is permanently cooled by the engine oil. As a result, the heat input is lower than when using an electric motor.
  • a heat exchanger is furthermore provided, via which the engine oil is cooled.
  • the hydraulic motor is connected to the engine oil circuit parallel to the engine.
  • the engine oil flow can be controlled by the hydraulic motor regardless of the engine oil flow through the engine.
  • a separate pump can be used to drive the hydraulic motor.
  • the pump may have a nominal power between 0.1 kW and 10 kW, preferably between 0.5 kW and 3 kW.
  • the pump can, for example, be driven by the same output of the internal combustion engine as the engine oil pump.
  • Both pumps can be arranged on the same shaft.
  • the pump can be connected via a transfer case with the internal combustion engine.
  • the present invention can be used particularly preferably in a drive system in which the internal combustion engine drives a working and / or driving hydraulics.
  • one or more pumps are provided, which are driven by the internal combustion engine and provide the hydraulic pressure for the working and / or driving hydraulics available.
  • the pumps are driven by a pump distributor gearbox.
  • the hydraulic motor according to the invention can also be supplied with hydraulic pressure via the hydraulic system of the working and / or driving hydraulics.
  • the pressure level of the working and / or driving hydraulics is usually too high for the drive of the hydraulic motor of the energy recovery system.
  • the operating pressure of the working and / or driving hydraulics is, for example, between 100 and 300 bar.
  • the operating pressure for operating the hydraulic motor according to the invention is preferably between 2 and 20 bar, in particular between 3 and 10 bar.
  • a separate pump is used to drive the hydraulic motor.
  • the pump which drives the hydraulic motor may be driven via the pump transfer case.
  • the hydraulic fluid for driving the hydraulic motor can be taken from a tank of the working and / or driving hydraulics. This does not require separate cooling.
  • the drive system comprises in a first embodiment, a valve arrangement which controls the flow through the hydraulic motor.
  • valve arrangement may comprise a pressure regulator.
  • valve arrangement may comprise a pressure relief valve.
  • the hydraulic motor and / or the pump for driving the hydraulic motor are designed as constant machines.
  • the pump which actuates the hydraulic motor is a variable displacement pump and / or the hydraulic motor is an adjusting motor.
  • the control is preferably at least also by adjusting the displacement of the pump and / or the hydraulic motor.
  • this comprises a controller, which controls the hydraulic motor and / or the energy recovery system in dependence on operating parameters of the internal combustion engine and / or the energy recovery system.
  • both the hydraulic motor and the pump of the energy recovery system may be constant displacement machines, i. H. around a motor or a pump with a constant displacement volume.
  • the control of the hydraulic motor takes place by the control of the volume flow through the hydraulic motor.
  • an adjusting motor and / or a variable displacement pump could also be used.
  • the control could also be effected by a control of the adjustment volume of the pump or the hydraulic motor.
  • the drive system according to the present invention may be constructed and controlled in the same way as those of EP 2 527 635 A2 known drive systems.
  • the content of the EP 2 527 635 A2 made the subject of the present application.
  • the heat exchanger of the energy recovery system can be connected to the exhaust system of the internal combustion engine.
  • the energy recovery system converts the residual heat contained in the exhaust gas of the internal combustion engine into mechanical energy.
  • the heat exchanger can be arranged in particular in the region of exhaust gas recirculation of the internal combustion engine.
  • connection arrangement can be provided, by means of which the mechanical energy generated by the energy recovery system is coupled into the mechanical energy generated by the internal combustion engine.
  • connection arrangement may comprise a transmission, by means of which an output shaft of the energy recovery system is connected to an output shaft of the internal combustion engine.
  • the output shaft of the expander can be connected to the output shaft of the internal combustion engine.
  • the output shaft of the energy recovery system is coupled via a clutch to the output shaft of the internal combustion engine, wherein the clutch is advantageously controlled by means of a pressure and / or a temperature in the energy recovery system.
  • the fluid circuit of the energy recovery system according to the invention can continue next to the heat exchanger, in which the fluid in the fluid circuit is advantageously heated by the waste heat of the engine have a capacitor.
  • the fluid in the fluid circuit is first printed by the pump, then heated in the heat exchanger, so that it assumes a gaseous state.
  • the fluid is then expanded in the expander while releasing mechanical energy. Finally, the fluid is cooled in the condenser and liquefied again, whereupon it flows back to the pump or to a tank to which the pump is connected.
  • the condenser of the energy recovery system can be cooled via the cooling circuit of the internal combustion engine.
  • the hydraulic motor is controlled as a function of one or more input parameters, in particular as a function of a signal of a sensor arranged in front of the expander in the fluid circuit and / or as a function of engine parameters.
  • the sensor may be a temperature sensor and / or a pressure sensor.
  • the energy recovery system may include a bypass line through which the fluid mass flow in the fluid circuit can be routed around the expander.
  • the energy recovery system according to the invention operates according to the Clausius-Rankine principle.
  • the present invention further comprises, in addition to the drive system, an energy recovery system with a hydraulic motor for a drive system according to the invention.
  • the energy recovery system and the hydraulic motor are constructed as shown in detail above.
  • the energy recovery system further comprises the corresponding control for the hydraulic motor.
  • the present invention further comprises a traveling implement and / or a vehicle with a drive system, as described above.
  • the drive system can be used in particular for driving a chassis and / or to drive a working equipment of the implement.
  • the drive system can be used to drive one or more hydraulic pumps for driving a hydraulic system of the implement or vehicle.
  • the hydraulic system can serve to drive a working equipment and / or a chassis of a movable implement.
  • the single drawing shows an embodiment of a drive system according to the invention from an internal combustion engine and an energy recovery system.
  • the energy recovery system has a fluid circuit with a pump 3, a heat exchanger 4 and an expander 5.
  • the heat exchanger 4 is connected to the exhaust line of the internal combustion engine 1, so that the waste heat of the internal combustion engine is transmitted through the heat exchanger 4 to the fluid in the fluid circuit of the energy recovery system and converted by the expander 5 into mechanical energy.
  • the fluid is thereby printed by the pump 3, takes in the heat exchanger 4, the waste heat of the exhaust gas and thereby changes to the gaseous state.
  • the gaseous medium then expands in the expander 5 with release of mechanical energy.
  • a condenser 6 is further provided, in which the gaseous medium recondensed.
  • the pump 3 ensures before the medium enters the heat exchanger for an increase in pressure and for the circulation of the medium in the fluid circuit.
  • a tank and / or a filter may be provided in the fluid circuit.
  • the fluid in the fluid circuit of the energy recovery system may in particular be an organic fluid.
  • the energy recovery system acts according to the Clausius-Rankine principle. Such systems are therefore also referred to as ORC (Organic Rankine Cycle).
  • the pump 3 is driven by a hydraulic motor 7.
  • Hydraulic motors have a significantly higher power density than electric motors. This can achieve a significant packaging advantage.
  • the hydraulic pump has a longer service life, insensitivity to EMC influences and high safety in fire-prone environments.
  • the hydraulic motor 7 is driven in the embodiment via the engine oil pump 8.
  • the hydraulic motor 7 is thereby permanently cooled by the engine oil.
  • the heat output is lower than in an electric motor.
  • the engine oil circulates in the engine oil circuit of the engine oil pump 8 via at least one supply line 9 through the engine 1 and via a return line 10 back to the oil pump 8.
  • a further return line 11 from the engine 1 to the oil pump 8 is located.
  • In the engine oil circuit may also be provided a heat exchanger for cooling the engine oil.
  • the hydraulic motor 7, which drives the pump 3 of the energy recovery system, is included in the exemplary embodiment parallel to the internal combustion engine 1 in the engine oil circuit.
  • the hydraulic motor is thus supplied via a separate supply line 12 with engine oil, which flows back via a return line 13 to the engine oil pump 8.
  • the control of the energy recovery system is carried out in the embodiment by the control of the volume flow through the hydraulic motor 7.
  • This can be used as a hydraulic motor, a constant-displacement motor and pump as a constant pump.
  • the engine oil flow is controlled by the hydraulic motor 7 via a pressure regulator 15.
  • a pressure limiting valve 14 is additionally provided between the engine oil pump 8 and the hydraulic motor 7.
  • the hydraulic motor 7 or the volume flow through the hydraulic motor is preferably controlled as a function of operating parameters of the internal combustion engine 1 or of the energy recovery system.
  • the energy generated by the expander 5 is preferably coupled into the mechanical energy generated by the internal combustion engine 1.
  • the output shafts of the internal combustion engine and of the expander can be coupled, for example via a transmission and / or via a clutch.
  • the energy recovery system according to the invention is preferably set in a movable working device.
  • the internal combustion engine can be used in particular for driving the chassis and / or the work equipment.
  • the internal combustion engine can control a working hydraulics of the movable working device.
  • the oil pump 8, which is used in the embodiment for driving the hydraulic motor 7, is preferably driven via the internal combustion engine 1. This results in an extremely compact design.
  • the structure of the energy recovery system, its control and its integration into the drive system corresponds to that from the EP 2 527 635 A2 known arrangement.
EP20140158834 2013-04-12 2014-03-11 Système d'entraînement Withdrawn EP2789838A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH00773/13A CH707888A1 (de) 2013-04-12 2013-04-12 Antriebssystem.

Publications (1)

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EP2789838A1 true EP2789838A1 (fr) 2014-10-15

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Family Applications (1)

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EP20140158834 Withdrawn EP2789838A1 (fr) 2013-04-12 2014-03-11 Système d'entraînement

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EP (1) EP2789838A1 (fr)
CH (1) CH707888A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20210376650A1 (en) * 2020-06-01 2021-12-02 Harrison Hydra-Gen Self-charging auxiliary power system for a vehicle

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3047258A1 (de) * 1980-01-24 1981-09-24 List, Hans, Prof. Dipl.-Ing. Dr.Dr.h.c., Graz Wassergekuehlte brennkraftmaschine mit druck-oelschmierung und kuehlwasserpumpe
JP2007239566A (ja) * 2006-03-08 2007-09-20 Hino Motors Ltd Ｅｇｒガスの排熱エネルギを利用した過給機の補助装置
JP2011027000A (ja) * 2009-07-23 2011-02-10 Sanden Corp 廃熱利用装置
EP2527635A2 (fr) 2011-05-27 2012-11-28 Liebherr-Machines Bulle SA Système de récupération d'énergie

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4017095C2 (de) * 1990-05-12 1995-08-03 Man Nutzfahrzeuge Ag Hydrostatisch-mechanischer Antrieb von Nebenaggregaten
DE102007062580A1 (de) * 2007-12-22 2009-06-25 Daimler Ag Verfahren zur Rückgewinnung einer Verlustwärme einer Verbrennungskraftmaschine
EP2256247B2 (fr) * 2009-05-25 2017-08-09 Joseph Vögele AG Finisseuse de route
DE102010025184A1 (de) * 2010-06-26 2011-12-29 Daimler Ag Abwärmenutzungsvorrichtung

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3047258A1 (de) * 1980-01-24 1981-09-24 List, Hans, Prof. Dipl.-Ing. Dr.Dr.h.c., Graz Wassergekuehlte brennkraftmaschine mit druck-oelschmierung und kuehlwasserpumpe
JP2007239566A (ja) * 2006-03-08 2007-09-20 Hino Motors Ltd Ｅｇｒガスの排熱エネルギを利用した過給機の補助装置
JP2011027000A (ja) * 2009-07-23 2011-02-10 Sanden Corp 廃熱利用装置
EP2527635A2 (fr) 2011-05-27 2012-11-28 Liebherr-Machines Bulle SA Système de récupération d'énergie

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20210376650A1 (en) * 2020-06-01 2021-12-02 Harrison Hydra-Gen Self-charging auxiliary power system for a vehicle

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Publication number Publication date
CH707888A1 (de) 2014-10-15

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